We're dividing 71091760 by 641 
The aim is to understand the frequency of 641 in 71091760.

Let's proceed to step 1:
When dividing 7 by 641, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 641

Let's proceed to step 2:
If we divide 71 by 641, we get 0 and a remainder of 71.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 71 leaves us with 71.
Include the next digit (0) from the dividend after 71, then repeat: 710 / 641

Let's proceed to step 3:
The number 641 fits into 710 1 times, leaving a remainder of 69.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 641 from 710 leaves us with 69.
Append the next digit (9) from the dividend to 69 and continue with: 699 / 641

On to step 4:
641 goes into 699 1 times with a remainder of 58.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 641 from 699 to get 58.
Append the next digit (1) from the dividend to 58 and continue with: 581 / 641

Advancing to step 5:
If we divide 581 by 641, we get 0 and a remainder of 581.
The next digit of our result is 0. 
Result so far: 110.0
Deduct 0 from 581 and we're left with 581.
Bring next digit (7) of the dividend behind the 581 and repeat the process: 5817 / 641

Going ahead to step 6:
5817 divided by 641 is 9 with a remainder of 48.
Record the quotient 9 as the next digit in the result. 
Result so far: 1109.0
Subtracting 5769 from 5817 leaves us with 48.
Grab the next digit (6) from the dividend, add it to 48, then carry on: 486 / 641

Moving on to step 7:
641 goes into 486 0 times with a remainder of 486.
Record the quotient 0 as the next digit in the result. 
Result so far: 11090.0
If we take 0 away from 486, we end up with 486.
Bring next digit (0) of the dividend behind the 486 and repeat the process: 4860 / 641

Step 8:
641 can be fit into 4860 7 times, resulting in a remainder of 373.
The number 7 becomes the next digit in our result. 
Result so far: 110907.0
If we subtract 4487 from 4860, we get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Step 9:
If we divide 3730 by 641, we get 5 and a remainder of 525.
Put 5 as the next digit of the answer. 
Result so far: 110907.5
If we subtract 3205 from 3730, we get 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Going ahead to step 10:
The number 641 fits into 5250 8 times, leaving a remainder of 122.
Put 8 as the next digit of the answer. 
Result so far: 110907.58
If we take 5128 away from 5250, we end up with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Moving on to step 11:
If we divide 1220 by 641, we get 1 and a remainder of 579.
The next digit of our result is 1. 
Result so far: 110907.581
Deduct 641 from 1220 and we're left with 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

Step 12:
641 goes into 5790 9 times with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 110907.5819
Subtracting 5769 from 5790 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 13:
When dividing 210 by 641, we get 0 with a remainder of 210.
Record the quotient 0 as the next digit in the result. 
Result so far: 110907.5819
Subtract 0 from 210 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 14:
2100 divided by 641 is 3 with a remainder of 177.
Write down 3 as next digit of the result. 
Result so far: 110907.581903
Subtract 1923 from 2100 to get 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Let's proceed to step 15:
641 can be fit into 1770 2 times, resulting in a remainder of 488.
Put 2 as the next digit of the answer. 
Result so far: 110907.5819032
If we take 1282 away from 1770, we end up with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

On to step 16:
641 goes into 4880 7 times with a remainder of 393.
Put 7 as the next digit of the answer. 
Result so far: 110907.58190327
If we take 4487 away from 4880, we end up with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

After the division, we end up with 110907.58190327 and a remainder of 3.93e-07.